Home / 3,927.87-5,421.72-2,515.36

Finding the Fourth Proportional to 3,927.87, 5,421.72 and 2,515.36

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Solution

The fourth proportional to 3,927.87, 5,421.72 and 2,515.36 is: 3,472.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.87 : 5,421.72 = 2,515.36 : x
  2. Step 2: Convert to fraction form
    3,927.87/5,421.72 = 2,515.36/x
  3. Step 3: Cross multiply
    3,927.87x = 5,421.72 × 2,515.36
  4. Step 4: Simplify right side
    3,927.87x = 13,637,577.62
  5. Step 5: Solve for x
    x = 13,637,577.62/3,927.87
  6. Step 6: Final answer
    x = 3,472.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.